package com.alipay.config;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.webshop.service.OrderService;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/Ailiservlet")
public class AiLiServlet extends  javax.servlet.http.HttpServlet{

    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no =request.getParameter("WIDout_trade_no");

        //付款金额，必填
        String total_amount = request.getParameter("WIDtotal_amount");
        //订单名称，必填
        String subject = request.getParameter("WIDsubject");
        //商品描述，可空
        String body = request.getParameter("WIDbody");

        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //请求
        String result;
        OrderService orderService=new OrderService();
        orderService.update(out_trade_no);//这里将订单状态更改为支付状态，但是有点早。
        try {
            result = alipayClient.pageExecute(alipayRequest).getBody();
            response.setContentType("text/html;charset=" + AlipayConfig.charset);
            response.getWriter().write(result);//直接将完整的表单html输出到页面
            response.getWriter().flush();
            response.getWriter().close();
        } catch (AlipayApiException e) {
            e.printStackTrace();
            response.getWriter().write("捕获异常出错");
            response.getWriter().flush();
            response.getWriter().close();
        }
    }

}

